EP3995620B1 - Système de dérivation pour appareil électroménager à support de fluide - Google Patents
Système de dérivation pour appareil électroménager à support de fluide Download PDFInfo
- Publication number
- EP3995620B1 EP3995620B1 EP20205746.9A EP20205746A EP3995620B1 EP 3995620 B1 EP3995620 B1 EP 3995620B1 EP 20205746 A EP20205746 A EP 20205746A EP 3995620 B1 EP3995620 B1 EP 3995620B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- discharge path
- diverter
- diverter system
- low pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012530 fluid Substances 0.000 title claims description 91
- 230000004888 barrier function Effects 0.000 claims description 45
- 238000005406 washing Methods 0.000 claims description 21
- 238000005336 cracking Methods 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 11
- 230000014509 gene expression Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003599 detergent Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/083—Liquid discharge or recirculation arrangements
- D06F39/086—Arrangements for avoiding detergent wastage in the discharge conduit
Definitions
- the invention relates to a diverter system for a fluid-bearing household appliance.
- Fluid-bearing household appliances such as dishwashers, washing machines, steam ovens, etc. can be equipped with a fluid circulation system comprising a pump, wherein fluid diverters are provided in order to direct fluid to different elements of the household appliance.
- a fluid diverter can be arranged to supply a washing liquid to one or both of a spray arm for an upper rack and a spray arm for a lower rack of the dishwasher.
- a fluid diverter can be arranged to supply water to different detergent compartments.
- US 2010/0236588 A1 shows a water-bearing household appliance with a fluid diverter having a fluid distribution element structured as a rotating disc, which includes a plurality of passage openings.
- Fluid diverters need to be resistant to many types of dirt without becoming stuck. For this purpose, parts in the fluid diverters are provided with appropriate clearance. This makes a fluid tight sealing of a discharge path of the fluid diverter impossible. Therefore, such fluid diverters are typically not used to direct fluid towards a drain hose, and an additional system comprising an additional pump is provided in the household appliance in order to direct waste water to a drain hose.
- EP 1 046 369 A1 shows a two-way valve for a domestic appliance conducting liquid, with a liquid inlet, two liquid outlets, a setting element, and a valve body, which can be moved by the liquid into one of two closing settings, in each of which it closes a respective liquid outlet, wherein the setting element can guide the movement of the valve body directly into one of the closing settings without interrupting or deflecting the liquid flow, and wherein the setting element can leave both flow paths open.
- the check valve comprises a valve body, a valve core and springs.
- the valve body is cylindrical and is internally provided with a cavity and provided with a water inlet end and a water outlet end.
- the valve core is cylindrical and is elastically connected with the water outlet end through the springs.
- a diverter system for a fluid-bearing household appliance comprising a supply path, a first discharge path, a second discharge path, and a fluid diverter with a moveable fluid distribution element, wherein the moveable fluid distribution element is moveable for selectively connecting the supply path to one of the first discharge path and the second discharge path in a flow direction, and wherein a low pressure barrier device having an inlet side and an outlet side downstream of the inlet side in the flow direction is provided in the first discharge path, which is configured to prevent fluid flow from the inlet side to the outlet side when a pressure differential between the inlet side and the outlet side is below a cracking pressure.
- the paths may be formed integrally with a connection piece of a housing of the fluid diverter or comprise one duct element or a series duct elements, such as hose, pipe, channel or tube elements.
- the low pressure barrier device By arranging the low pressure barrier device in the first discharge path, a leakage flow to the first discharge path can be tolerated when disconnecting the first discharge path from the supply path via the flow diverter. This allows for example to connect the first discharge path to a drain hose, wherein during a use of the fluid-bearing household appliance, a fluid loss due to a leakage flow towards the drain hose is avoided.
- the low pressure barrier device is arranged inside a connecting piece of a housing of the fluid diverter. In other embodiments, the low pressure barrier device is connected to a connecting piece of the fluid diverter, either directly or indirectly via a duct element.
- the moveable fluid distribution element in addition can be moved to selectively connect the supply path to none and/or to both of the first discharge path and the second discharge path in a flow direction.
- the diverter system comprises exactly two discharge paths, wherein the first discharge path can be connected to the drain hose and the second discharge path can be connected to an operating chamber of the household appliance.
- the expression "operating chamber" of a household appliance is used to describe a confined space in which the fluid is used to perform an appliance specific task, for example a washing chamber with a washing drum of a washing machine, a dishwashing chamber with one or several racks of a dishwasher, or an oven chamber of a steam oven.
- the second discharge path for example serves to supply a washing liquid to a washing chamber of a washing machine or to supply a steam towards an oven chamber of a steam oven.
- the diverter system comprises more than two discharge paths, wherein the diverter system is further used to direct a fluid to different elements of the household appliance, for example to different detergent compartments of a washing machine and/or to spray arms of an upper and/or a lower rack of a dishwasher.
- the diverter system comprises only one low pressure barrier device, which is arranged in the first discharge path, wherein a leakage flow through the second discharge path is tolerated when connecting the supply path to the first discharge path.
- several or each discharge path of the diverter system are/is equipped with a low pressure barrier device.
- the low pressure barrier device comprises a closing element, a seat, and a return element, in particular a resilient return element, wherein the closing element is arranged displaceable between a closing position, in which the closing element contacts the seat to prevent fluid flow from the inlet side to the outlet side, and an opening position, in which fluid can flow from the inlet side to the outlet side, wherein the closing element is moveable against a force applied by the return element from the closing position into the opening position, and wherein the return element is configured to force the closing element against the seat and to return the closing element into the closing position when a pressure differential between the inlet side and the outlet side is below the cracking pressure.
- the closing element, the seat, and the return element can be structured by the person skilled in the art in order to obtain a suitable cracking pressure and to prevent clocking of the first supply path and/or of the low pressure barrier device due to dirt in the fluid flowing through the low pressure barrier device.
- the closing element is a valve head with a flow profile having a low flow resistance and the return element is a spring, in particular a coil spring arranged downstream of the closing element.
- the closing element is structured as a sphere, hemisphere, ellipsoid or drop-shaped element.
- the shape is in particular chosen to avoid edges and corners at which dirt could accumulate.
- the shape can be chosen by the person skilled in the art to avoid high pressure resistance.
- the return element in an advantageous embodiment is an elastic band, wherein the elastic band is fixed to the first discharge path at the inlet side of the low pressure barrier device.
- the elastic band has a smooth surface to prevent an adhesion of dirt.
- the return element and the closing element are formed as a single piece.
- the return element and the closing element are formed as a common injection molded part or as a common 3D printed part.
- the material of the single piece can be chosen by the person skilled in the art to ensure sufficient sealing properties, to ensure sufficient resilient properties, and/or to avoid adhesion of dirt.
- the low pressure barrier device can be mounted in any suitable section of the first discharge path.
- the low pressure barrier device is horizontally arranged, i.e. the closing element is moved in a horizontal direction between the closing position and the opening position, in order to prevent a movement of the closing element into the opening position due to gravitational forces.
- the low pressure barrier device is arranged adjacent to the fluid diverter.
- the expression "adjacent" is not to be interpreted as being limited to a bordering arrangement.
- a small pipe element can be arranged between an outlet port of the fluid diverter and the low pressure barrier device to allow for a suitable mounting position of the low pressure barrier device within the household appliance.
- a distance between the fluid diverter and the low pressure barrier device is preferably kept small in order to minimize a fluid quantity between the fluid diverter and the low pressure barrier device.
- the low pressure barrier device and the fluid diverter are housed in a common housing.
- the housing allows for a simple installation and/or an installation in a limited space.
- the moveable fluid distribution element is a slider.
- the moveable fluid distribution element is a rotatable disc with a passage channel, wherein by rotating the rotatable disc the passage channel can be selectively arranged upfront of one of the first discharge path and the second discharge path.
- a flow diverter with a rotatable disc is shown for example in US 2010/0236588 A1 .
- the passage channel is arranged such that a flow through the passage channel is in parallel to an axial direction of the rotating disc.
- the passage channel can be arranged by rotating the rotatable disc to partly or fully expose the first or the second discharge path, in order to allow a reduced flow or a maximum flow through the discharge path.
- a number of passage channels are provided.
- the first discharge path is closed by the rotating disc, wherein leakage fluid may enter the first discharge path due to clearance.
- a pressure of the fluid entering the first discharge path is below the cracking pressure, and the low pressure barrier device prevents a flow through the first discharge path for example towards a drain hose.
- the second discharge path is fluidly connectable via an operating chamber of the household appliance to the supply path.
- the expression "fluidly connected” is used to describe that fluid is able to flow from the second discharge path to the supply path for a circulation.
- Paths or elements fluidly connected are not necessarily directly or indirectly mechanically connected.
- the second discharge path may be fluidly connected to a spray arm, which supplies a washing liquid into the operating chamber of the dishwasher, wherein the supply path of the diverter system is mechanically connected to the sump of the dishwasher.
- a pump is provided, which is arranged in or upstream of the supply path.
- exactly one pump is provided, which is used to circulate the fluid for a washing task in a washing machine or a dishwasher or for a cooking task in a steam oven, and also used to convey the fluid to the drain hose.
- a fluid-bearing household appliance comprising the diverter system.
- the first discharge path is connected to a drain hose. Due to the low pressure barrier device, a leakage flow of the fluid during an operation of the household appliance can be avoided.
- the fluid-bearing household appliance in embodiments further comprises an operating chamber, wherein the second discharge path is fluidly connected via the operating chamber to the supply path.
- the fluid connection allows for a circulation of the fluid during an operation, wherein a fluid loss due to a leakage flow via the first discharge path is avoided.
- any fluid-bearing household appliance could be equipped with the diverter system.
- the use of the diverter system is in particular advantageous in a household appliance having a circulating fluid, which is recurringly discarded, for example after each operation or after several operations, for example a dishwasher, a washing machine or a steam oven.
- Fig. 1 shows in a schematic view a fluid-bearing household appliance 1 structured as a washing machine, which is equipped with a diverter system 2.
- the washing machine has a housing 10 with an operating chamber 11, in which a washing drum 12 is provided.
- the operating chamber 11 is accessible via a door 13.
- a filter 14 is provided at a sump of the operating chamber 11.
- the diverter system 2 shown in Fig. 1 comprises a fluid diverter 20, a low pressure barrier device 21, a pump 22, a supply path 23, a first discharge path 24, and a second discharge path 25.
- a sump of the operating chamber 11 is connected via the filter 14 and a pipe element 15 to the pump 22.
- the pump 22 is connected via the supply path 23 to the fluid diverter 20.
- the first discharge path 24 is equipped with the low pressure barrier device 21 having an inlet side 210 and an outlet side 212. At the outlet side 212, the discharge path 24 is connected to a drain hose 3.
- the low pressure barrier device 21 is configured to prevent fluid flow from the inlet side 210 to the outlet side 212 when a pressure differential between the inlet side 210 and the outlet side 212 is below a cracking pressure.
- the second discharge path 25 is connected to a nozzle 26 to supply fluid to the operating chamber.
- the fluid diverter 20 and the low pressure barrier device 21 are housed in a common housing 4.
- the fluid diverter 20 comprises a moveable fluid distribution element 200, which is moveable for selectively connecting the supply path 23 to one of the first discharge path 24 and the second discharge path 25 in a flow direction indicated by arrows in Fig. 1 .
- the moveable fluid distribution element 200 in short is also referred to as moveable element.
- the moveable fluid distribution element 200 is a rotatable disc with one passage channel, wherein by rotating the rotatable disc the passage channel can be selectively arranged upfront of one of the first discharge path 24 and the second discharge path 25.
- the invention is not limited to such a design.
- the pump 22 can be operated to circulate a fluid, in particular a washing liquid, wherein the fluid is supplied from the supply path 23 to the second discharge path 25 and via the second discharge path 25 and the nozzle 26 to the operating chamber 11, and the fluid removed via the filter 14 and the pump 22 from the sump of the operating chamber 11 and conveyed back to the supply path 23.
- a fluid in particular a washing liquid
- a leakage flow through the flow diverter 20 to the first discharge path 24 may occur due to clearance in the flow diverter 20.
- a pressure differential between the inlet side 210 and the outlet side 212 of the low pressure barrier device 21 remains below the cracking pressure of the low pressure barrier device 21, and the low pressure barrier device 21 prevents fluid flow to the drain hose 3.
- the low pressure barrier device 21 thus prevents a fluid loss during the circulation of the fluid through the operating chamber 11.
- the pump 22 can be operated to convey the fluid, in particular the washing liquid, towards the low pressure barrier device 21, wherein the pressure differential between the inlet side 210 and the outlet side 212 reaches or exceeds the cracking pressure of the low pressure barrier device 21, and the low pressure barrier device 21 is opened to allow a fluid flow to the drain hose 3.
- the low pressure barrier device 21 may comprise a closing element 213, a seat 214, and a return element 215 in the form of a coil spring, which is arranged downstream of the closing element and forces the closing element against the seat as long as the pressure differential between the inlet side 210 and the outlet side 212 remains below the cracking pressure of the low pressure barrier device 21,
- the low pressure barrier device 21 is horizontally arranged, i.e. a movement direction of the closing element 213 is in a horizontal direction, in order to prevent a movement of the closing element into the opening position due to gravitational forces.
- Fig. 2 and 3 schematically show an alternative embodiment of a low pressure barrier device 21 in a closing position and an opening position, respectively.
- the low pressure barrier device 21 has an inlet side 210 and an outlet side 212 and comprises a closing element 213, a seat 214, and a return element 215, which in the embodiment of Fig. 2 is in the form of an elastic band, which is arranged upstream of the closing element 213 in a flow direction indicated by an arrow.
- a distal end of the elastic band is fixed to a wall of the first discharge path 24 at the inlet side 210 of the low pressure barrier device 21. Structuring the return element 215 as an elastic band is advantageous in order to avoid that dirt adheres to the return element 215.
- the closing element 213 shown in Fig. 2 and 3 is structured as a sphere and the return element 215 and the closing element 213 are formed as a single piece.
- the closing element 213 is arranged displaceable between the closing position shown in Fig. 2 , in which the closing element 213 contacts the seat 214 to prevent fluid flow from the inlet side 210 to the outlet side 212, and the opening position shown in Fig. 3 , in which fluid can flow from the inlet side 210 to the outlet side 212.
- the return element 215 is configured to force the closing element 213 against the seat 214 and when the pressure differential exceeds the cracking pressure, the closing element 213 is moveable against a force applied by the return element 215 from the closing position shown in Fig. 2 into the opening position shown in Fig. 3 .
- the resilient force of the return element 215 forces the closing element 213 to return into the closing position.
- the supply path 24 in one embodiment is formed as a single piece together with a connecting piece of the fluid diverter 21 (see Fig. 1 ), wherein at an outer periphery of the supply path 24 an external thread could be provided for connecting the drain hose 3 (see Fig. 1 ) to the supply path.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Water Supply & Treatment (AREA)
- Mechanically-Actuated Valves (AREA)
- Washing And Drying Of Tableware (AREA)
Claims (15)
- Système de dérivation pour un appareil électroménager à transport de fluide (1) comprenant un chemin d'alimentation (23), un premier chemin d'évacuation (24), un second chemin d'évacuation (25) et un organe de dérivation de fluide (20) avec un élément mobile de distribution de fluide (200), dans lequel l'élément mobile de distribution de fluide (200) est mobile pour relier de façon sélective le chemin d'alimentation (23) à l'un du premier chemin d'évacuation (24) et du second chemin d'évacuation (25) dans un sens d'écoulement, caractérisé en ce que un dispositif barrière à basse pression (21) ayant un côté d'entrée (210) et un côté de sortie (212) en aval du côté d'entrée (210) dans le sens d'écoulement est ménagé dans le premier chemin d'évacuation (24), qui est configuré pour empêcher un écoulement de fluide depuis le côté d'entrée (210) vers le côté de sortie (212) quand un différentiel de pression entre le côté d'entrée (210) et le côté de sortie (212) est inférieur à une pression de rupture.
- Système de dérivation selon la revendication 1, caractérisé en ce que le dispositif barrière à basse pression (21) comprend un élément de fermeture (213), un siège (214) et un élément de rappel (215), en particulier un élément de rappel résilient, dans lequel l'élément de fermeture (213) est agencé de façon à pouvoir se déplacer entre une position de fermeture, dans laquelle l'élément de fermeture (213) est en contact avec le siège (214) pour empêcher un écoulement de fluide depuis le côté d'entrée (210) vers le côté de sortie (212), et une position d'ouverture, dans laquelle du fluide peut s'écouler depuis le côté d'entrée (210) vers le côté de sortie (212), dans lequel l'élément de fermeture (213) est mobile en opposition à une force appliquée par l'élément de rappel (215) depuis la position de fermeture vers la position d'ouverture, et dans lequel l'élément de rappel (215) est configuré pour forcer l'élément de fermeture (213) contre le siège (214) et pour ramener l'élément de fermeture (213) dans la position de fermeture quand un différentiel de pression entre le côté d'entrée (210) et le côté de sortie (212) est inférieur à une pression de rupture.
- Système de dérivation selon la revendication 2, caractérisé en ce que l'élément de fermeture (213) est structuré comme un élément en sphère, en hémisphère ou en forme de goutte.
- Système de dérivation selon la revendication 2 ou 3, caractérisé en ce que l'élément de rappel (215) est une bande élastique, dans lequel la bande élastique est fixée au premier chemin d'évacuation (24) du côté d'entrée (210) du dispositif barrière à basse pression (21).
- Système de dérivation selon l'une quelconque des revendications 2 à 4, caractérisé en ce que l'élément de rappel (215) et l'élément de fermeture (213) sont formés d'une seule pièce.
- Système de dérivation selon l'une quelconque des revendications 2 à 5, caractérisé en ce que le dispositif barrière à basse pression (21) est agencé horizontalement afin d'empêcher un mouvement de l'élément de fermeture (213) vers la position d'ouverture sous l'effet de forces gravitationnelles.
- Système de dérivation selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le dispositif barrière à basse pression (21) est agencé en position adjacente à l'organe de dérivation de fluide (20).
- Système de dérivation selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le dispositif barrière à basse pression (21) et l'organe de dérivation de fluide (20) sont logés dans un logement commun (4).
- Système de dérivation selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'élément mobile de distribution de fluide (200) est un disque rotatif doté d'un canal de passage, dans lequel, par une rotation du disque rotatif, le canal de passage peut être disposé de façon sélective devant l'un du premier chemin d'évacuation (24) et du second chemin d'évacuation (25).
- Système de dérivation selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le second chemin d'évacuation (25) peut être relié de manière fluidique au chemin d'alimentation (23) via une chambre d'actionnement (11) de l'appareil électroménager (1).
- Système de dérivation selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le système de dérivation (2) comprend en outre une pompe (22), laquelle pompe est agencée dans le chemin d'alimentation (23) ou en amont de celui-ci.
- Appareil électroménager à transport de fluide comprenant le système de dérivation (2) selon l'une quelconque des revendications 1 à 11.
- Appareil électroménager à transport de fluide selon la revendication 12, caractérisé en ce que le premier chemin d'évacuation (23) est relié à un tuyau de vidange (3).
- Appareil électroménager à transport de fluide selon la revendication 12 ou 13, comprenant en outre une chambre d'actionnement (11), dans lequel le second chemin d'évacuation (25) est relié de manière fluidique au chemin d'alimentation (23) via la chambre d'actionnement (11).
- Appareil électroménager à transport de fluide selon l'une quelconque des revendications 11 à 14, dans lequel l'appareil électroménager à transport de fluide est un lave-vaisselle, un lave-linge ou un four à vapeur.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL20205746.9T PL3995620T3 (pl) | 2020-11-04 | 2020-11-04 | Układ rozdzielczy dla przenoszącego płyn urządzenia gospodarstwa domowego |
EP20205746.9A EP3995620B1 (fr) | 2020-11-04 | 2020-11-04 | Système de dérivation pour appareil électroménager à support de fluide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20205746.9A EP3995620B1 (fr) | 2020-11-04 | 2020-11-04 | Système de dérivation pour appareil électroménager à support de fluide |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3995620A1 EP3995620A1 (fr) | 2022-05-11 |
EP3995620B1 true EP3995620B1 (fr) | 2024-01-03 |
Family
ID=73059768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20205746.9A Active EP3995620B1 (fr) | 2020-11-04 | 2020-11-04 | Système de dérivation pour appareil électroménager à support de fluide |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3995620B1 (fr) |
PL (1) | PL3995620T3 (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19918337A1 (de) * | 1999-04-22 | 2000-10-26 | Bsh Bosch Siemens Hausgeraete | Zweiwegeventil für ein flüssigkeitsführendes Haushaltsgerät |
DE102007057336A1 (de) | 2007-11-28 | 2009-06-04 | BSH Bosch und Siemens Hausgeräte GmbH | Wasserführendes Haushaltsgerät mit einer Wasserweiche |
US9027578B2 (en) * | 2011-04-25 | 2015-05-12 | General Electric Company | Water diverter valve and related dishwasher |
CN106958673A (zh) * | 2017-05-09 | 2017-07-18 | 苏州市海朋电子商务有限公司 | 挂烫机单向阀 |
-
2020
- 2020-11-04 EP EP20205746.9A patent/EP3995620B1/fr active Active
- 2020-11-04 PL PL20205746.9T patent/PL3995620T3/pl unknown
Also Published As
Publication number | Publication date |
---|---|
EP3995620A1 (fr) | 2022-05-11 |
PL3995620T3 (pl) | 2024-05-13 |
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